List of highways numbered 391

Canada

• Manitoba [Provincial Road 391]
• Newfoundland and Labrador Route 391
• Quebec Route 391

Japan

• Japan [National Route 391]

United States

• Interstate 391
• Colorado [State Highway 391]
• Florida [State Road 391]
• New York [State Route 391]
• Puerto Rico Highway 391
• South Carolina Highway 391
• South Dakota Highway 391
• Tennessee State Route 391
• Virginia State Route 391
• Wyoming Highway 391